Automatic valve for flush tanks



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Y "R, L. LASH AUTOMATIC VALVE FOR FLUSH TANKS Filed Sept. 26, 1925 noemer L. LAsH,

OF NORFOLK, VIRGINIA, ASSGNOR TO LAS'-TCHMANN TALVE CORPORATON, OF NORFOLK, VRGINIA.

AUTOMATC VALVE FOR FLUSH TANKS.

AApplieationfiled September 26, 1925. Serial No. 53,84?.

Y This invention relates in general to autoe matic valves for flush tanks and more particularly to means Jfor reducing the noise and splashing incident to the operation ot' such valves.

lt is an object of my invention to provide a .tloat controlled valve of'this character readadaptable for use in tanks of various shapes and dimensions and in which the .0 valve is so arranged that it may be easily rcmoved for the replacing ot the gasket or washer. Y

lt is a further object of my invention to so design my valve. as to prevent leakage 5 from the. valve body and to reduce to a minimum the noise and splashing incident to the operation thereof.

Other objects of my invention will appear in the specification andclaims and will he disclosed in the accompanying drawings in which- Y The iigureris, largely, a central vertical section througa my valve chamber body.` 1 Referring now with greater particularity to the drawing it will be seen that my device is comprised as follows:

The flush box is provided with an aperture 2 in the base through which one end oli the elbow inlet pipe 8 is inserted and secured. T he valve chamber body t is mounted on and connected to the elbow 3 by means of. a straight. section of tubing 5 which mayV be of any Alength desired in accordance with the height of the maximum water level desired in the flush box. The valve chamber is substantially cylindrical and has a lon- `gitudinrdly extending bore 6 open at one end and terminating at its other end in a re-^ cess 7 having a portion 8 thereof provided with steeply pitched screw threads 9 tor the reception of the screw threaded end 10 of the valve stem 11. Radially extending bores 12, 14: and 18 are provided for reception of the inlet pipe 5, the outlet pipe 15, and the reiill pipe 16, respectively. At its 'sin open end the valve chamber-body is providedV with external screw threads 9A the purpose of which will be described hereinafter. A

valve seat surrounding the end of a com-A ot which grooves 2l and 22 are cut into the valve stem. Towards the open end of the. bore ot the valve chamber body the valve stem hasV a disk-like portion 28 ot such a diameter that itvhas a smooth sliding fit ithin the bore 6. V

A washer or gasket 28 is adapted to be slipped over the screw threaded endV of the valve stem and forced into the groove Q2 where it is held in position secured against the valve portion 2O by a cap 27 having an inturned flange 26 for engaging the :gasket and being provided with internal screw kthreads tor securing the cap to the screw threaded portion of the valve portion ot' the stem. A washer is mounted in the groove 21 'to prevent leakage past the disk portion 28. A cap 29 having a central bore to permit of the passage of the end 8O ot the, valve stem and having internal screw threads adapted to engage with the screw threads 24C oft the valve chamber body/,is provided to hold the parts in their assembled position and to provide an additional bearing for the end 80 ot' the valve stem. The end 30.01: the stem has a diametrically extending bore 31 for the reception ot the ball rod 32 which is connected to the usual flush ball, not shown. Y

The mouth of the outlet pipe 15 is adjacent the bottom of the flush tank and will always be positioned below the upper end orl the outlet nipple 35 leading from the flush box. rhus there will always be some water standing in the pipe 15 with the result that there will be no splashing from the rush of water as the tank is being filled since the water is always entering below the level of the water in the tank.

From the Jforegoing the operation of my device will be seen to be as follows: The rotation of the valve stem under the influence of motion from the ball or oat causes the gasket 28 to be moved toward or away from the valve seat 17 to open or close the bore 18. llhen the valve is open the waterenters through the inlet pipe 5 passes through the bore 18 and 'out through the pipe 15 where it emerges under the level of the water in the flush tank preventing splashing and reducing theV noise of operation. When the gasket 28 becomes worn it is merely necessary to remove the cap 29, screw the valve stem out of the screw threaded bore 8 and unscrew the cap 26. The valve which l have designed is one which may be accessiblyn mountedY in tlusli tanks ot' any dimensions and shape since the oii'set elbow 3 and the pipes 5 and 15Y are ot' standard stock and may be readily secured ot' the dimensions required.

I claim- 1. In combination, in a valve of the character described, a valve Ychamber having a longitudinal bore, inlet and outlet means communicating with said bore intermediate or" the ends of said chamber, a valve movable simultaneously longitudinallyT and rotatively in said bore. and means for preventing leakage past the stein ot said valve.

2. In combination, in a valve ot the chai'- acter described, a valve chamber having a longitudinal bore open at one end and terminating in a screw threaded recess at the other, inlet and outlet means communicating with said boie intermediate ot the ends ot said chamber, a valve having a threaded stein for engaging in said screw threaded recess wlieieby it is movable loiigitudinall;7 and rotatively in said bore, and closure means for the open end ot said bore having a bearing for the reception of the valve stem, means mounted on the stem of said valve t'or preventing leakage past the stem of said valve.

3. A valve including a valve stem having an enlarged screwtlii'eaded portion intermediate ot its ends, an open ended cap having an inwardly extending iiange and screwthreaded-ly engaging said enlarged valve stein portion, and a gasket mounted on said stein and secured in position against said enlarged valve stein portionrby said flange. et. valve including a valve stein having Yan enlarged screwtlireaded portion intermediate ot' its ends, a shallow circumferential groove iii said stem adjacent said enlarged portion, an open ended cap having an inwardly extending iange and screwthi'eadedly engaging said enlarged valve stem portion, and a gasket mounted on said stein in said groove and secured in position against said enlarged valve stein portion by said flange and groove.

A valve including a valve chamber having a. longitudinal bore open at one end and terminating at the other in a screw threaded recess. inlet and outlet orilices intermediate ot the ends of said 'alve chainber.l a valve seat. between said oriiices. a valve stein having one end screwtlii'eadedly engaging in said recess, said valve stem having an enlarged externally screw threaded portion intermediate ot' its ends and a circumferential groove on each side thereof, a gasket mounted in one of said grooves and movable to bear against said valve seat, an open ended cap screw threadedly engaging said enlarged valve stein portion and having an inwardly extending flange to secure said gasket in position, a gasket mounted in the other of said grooves and having a sliding lit in said bore, and a cap secured to said chamber for limiting the outward motion of said stem.

In testimony whereof I aiiix my signature.

ROBERT L. LASH. 

